Are you actually ready for slower-paced stories, or do you need at least some action? Because in 2026, the isekai that work best are the ones where creators aren't rushing to flesh out the world and focus on the characters instead. "The New Gate" and "Sword Art Online Progressive" went exactly that route - the focus isn't on how the hero becomes all-powerful in three episodes, but on how he actually learns and adapts. Plus the magic systems are way more thought-out than your typical standard package.
Just keep in mind one catch though: original isekai often come out in short seasons and studios don't always rush with translations. You might have to wait a month or two for Russian subtitles, or end up watching in English altogether. But then you'll be watching something that actually stands out instead of another copy-paste about some guy who randomly got divine powers.
If you really want something wild and unpredictable, look toward works where reincarnation isn't the main hook but just a plot device. Like "Reverse World" or experimental projects from smaller studios. Those stories often revolve around politics, philosophy, or weird settings that the creators actually put thought into.